#web_bg{
position:fixed;
top: 0;
left: 0;
width:100%;
height:100%;
min-width: 1000px;
z-index:-10;
background-repeat: no-repeat;
background-size: cover;
-webkit-background-size: cover;
-o-background-size: cover;
background-position: center 0;
}
#stuSignInData2017{ font-size: 30px;}
#stuSignInData2018{ font-size: 30px;}
#stuSignInData2019{ font-size: 30px;}
#digit{
position: absolute;
width: 158px;
height: 76px;
color: aqua;
}
#left1{
position: absolute;
width: 35%;
height: 40%;
bottom: 48%;
left: 0%;
}
#left3{
position: absolute;
width: 33%;
height: 40%;
bottom: 1%;
left: 0%;
}
#mid{
position: absolute;
width: 40%;
height: 65%;
bottom:8%;
left: 28%;
}
#right1{
position: absolute;
width: 35%;
height: 40%;
bottom: 48%;
right: 1%;
}
#right2{
position: absolute;
width: 35%;
height: 40%;
bottom: 1%;
right: 1%;
}
